[Android] response to click events (SpannableString) in textview)

Project requirements

Click a short text section in textView to display a dialog box.

Solution to failure

Two textView horizontal la s are used at the beginning. It can be imagined that when the first textView occupies a full row and no rows have been changed, the second textView may have a line feed layout problem.

SpannableString

The short text is underlined.

When you click a short text in textView, the system will process the text as a url and add a blue background to the text in the clicked part.

Solution

public class TouchableSpan extends ClickableSpan {    private boolean mIsPressed;    private int mPressedBackgroundColor;    private int mNormalTextColor;    private int mPressedTextColor;    public TouchableSpan(int normalTextColor, int pressedTextColor, int pressedBackgroundColor) {        mNormalTextColor = normalTextColor;        mPressedTextColor = pressedTextColor;        mPressedBackgroundColor = pressedBackgroundColor;    }    public void setPressed(boolean isSelected) {        mIsPressed = isSelected;    }    @Override    public void updateDrawState(TextPaint ds) {        super.updateDrawState(ds);        ds.setColor(mIsPressed ? mPressedTextColor : mNormalTextColor);        ds.bgColor = mIsPressed ? mPressedBackgroundColor : 0x00eeeeee;        ds.setUnderlineText(false);    }@Overridepublic void onClick(View widget) {//todo}}

class LinkTouchMovementMethod extends LinkMovementMethod {    private TouchableSpan mPressedSpan;    @Override    public boolean onTouchEvent(TextView textView, Spannable spannable, MotionEvent event) {        if (event.getAction() == MotionEvent.ACTION_DOWN) {            mPressedSpan = getPressedSpan(textView, spannable, event);            if (mPressedSpan != null) {                mPressedSpan.setPressed(true);                Selection.setSelection(spannable, spannable.getSpanStart(mPressedSpan),                        spannable.getSpanEnd(mPressedSpan));            }        } else if (event.getAction() == MotionEvent.ACTION_MOVE) {            TouchableSpan touchedSpan = getPressedSpan(textView, spannable, event);            if (mPressedSpan != null && touchedSpan != mPressedSpan) {                mPressedSpan.setPressed(false);                mPressedSpan = null;                Selection.removeSelection(spannable);            }        } else {            if (mPressedSpan != null) {                mPressedSpan.setPressed(false);                super.onTouchEvent(textView, spannable, event);            }            mPressedSpan = null;            Selection.removeSelection(spannable);        }        return true;    }    TouchableSpan getPressedSpan(TextView textView, Spannable spannable, MotionEvent event) {        int x = (int) event.getX();        int y = (int) event.getY();        x -= textView.getTotalPaddingLeft();        y -= textView.getTotalPaddingTop();        x += textView.getScrollX();        y += textView.getScrollY();        Layout layout = textView.getLayout();        int line = layout.getLineForVertical(y);        int off = layout.getOffsetForHorizontal(line, x);        TouchableSpan[] link = spannable.getSpans(off, off, TouchableSpan.class);        TouchableSpan touchedSpan = null;        if (link.length > 0) {            touchedSpan = link[0];        }        return touchedSpan;    }}

Don't forget to add

mStartPageTermsCondition.setMovementMethod(new LinkTouchMovementMethod());